TY - GEN
T1 - Tree initiation time evaluation of epoxy/silica composites by partial discharge detection
AU - Chen, Yu
AU - Imai, Takahiro
AU - Ohki, Yoshimichi
AU - Tanaka, Toshikatsu
PY - 2009/11/16
Y1 - 2009/11/16
N2 - Tree initiation time was evaluated by a pulse detection system developed by the authors to detect a small PD (partial discharge) signal that might take place at first just after a tree was formed. Six kinds of material were prepared for evaluation, i.e. base epoxy resin, microcomposite, two kinds of nanocomposites, and two kinds of nano-micro-mixed-composites. Lengths of trees detected were around 100 μm in our experiments. As a result, it was clarified that tree initiation time is prolonged by nano filler inclusion, but shortened by micro filler filling, and furthermore that nano fillers would help once-shortened time increase for micro filled epoxy specimens. PD erosion was evaluated for the same materials. It was confirmed that a good correlation exists between tree initiation time and PD resistance that is inverse to PD erosion. This correlation indicates that tree formation includes a PD erosion process. Detection of trees smaller than 100 um is required to clarify how a tree takes place at first.
AB - Tree initiation time was evaluated by a pulse detection system developed by the authors to detect a small PD (partial discharge) signal that might take place at first just after a tree was formed. Six kinds of material were prepared for evaluation, i.e. base epoxy resin, microcomposite, two kinds of nanocomposites, and two kinds of nano-micro-mixed-composites. Lengths of trees detected were around 100 μm in our experiments. As a result, it was clarified that tree initiation time is prolonged by nano filler inclusion, but shortened by micro filler filling, and furthermore that nano fillers would help once-shortened time increase for micro filled epoxy specimens. PD erosion was evaluated for the same materials. It was confirmed that a good correlation exists between tree initiation time and PD resistance that is inverse to PD erosion. This correlation indicates that tree formation includes a PD erosion process. Detection of trees smaller than 100 um is required to clarify how a tree takes place at first.
KW - Epoxy/silica composites
KW - PD detection
KW - PD erosion
KW - Tree initiation time
KW - Tree shape
UR - http://www.scopus.com/inward/record.url?scp=71049121068&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=71049121068&partnerID=8YFLogxK
U2 - 10.1109/ICPADM.2009.5252405
DO - 10.1109/ICPADM.2009.5252405
M3 - Conference contribution
AN - SCOPUS:71049121068
SN - 9781424443680
T3 - Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
SP - 404
EP - 407
BT - 2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009
T2 - 2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009
Y2 - 19 July 2009 through 23 July 2009
ER -